<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=GBK" /> 
<title>JS左右无缝滚动（一般方法+面向对象方法）</title> 
<style type="text/css"> 
.clearfix:after {content:"."; display:block; height:0; visibility:hidden; clear:both; } 
.clearfix { *zoom:1; } 
body{background:gray;} 
#wrap{width:810px; height:160px; 
border:1px solid black; 
position:relative; 
left:50%; 
top:50%; 
margin-left:-410px; 
margin-top:200px; 
background:#fff; 
overflow:hidden;} 
#wrap ul{margin:0px; 
padding:0px; 
position:absolute; 
top:0px; 
left:0px;} 
#wrap ul li{ list-style:none; float:left;margin:5px 10px;width:265px;} 
#wrap ul li img{ border:1px black solid; padding:10px;} 
</style> 
<!--script type="text/javascript"> 
window.onload=function(){ //一般方法 
var wrap=document.getElementById("wrap"); 
var wrap_ul=wrap.getElementsByTagName("ul")[0]; 
var wrap_li=wrap.getElementsByTagName("li"); 
wrap_ul.innerHTML+=wrap_ul.innerHTML; 
wrap_ul.style.width=(wrap_li[0].offsetWidth+20)*wrap_li.length+"px"; 
Autoscroll=setInterval(scroll,100); 
function scroll(){ 
wrap_ul.style.left=wrap_ul.offsetLeft-3+"px"; //这里因为ie对offsetLeft的解析不一样，所以ie下必须减大于等于3的数 
if(wrap_ul.offsetLeft<=-wrap_ul.offsetWidth/2){ 
wrap_ul.style.left="0px"; 
}else if(wrap_ul.offsetLeft>=0){ 
wrap_ul.style.left=-wrap_ul.offsetWidth/2+"px"; 
} 
} 
wrap.onmouseover=function(){ 
clearInterval(Autoscroll); 
} 
wrap.onmouseout=function(){ 
Autoscroll=setInterval(scroll,100); 
} 
} 
</script--> 
<script type="text/javascript"> 
function Slide(obj,direction,speed){ //面向对象的方法，可以自由控制方向，speed=>3 ie下可以 
this.container=document.getElementById(obj); 
this.content=this.container.getElementsByTagName("ul")[0]; 
this.lis=this.content.getElementsByTagName("li"); 
this.content.innerHTML+=this.content.innerHTML; 
this.content.style.width=(this.lis[0].offsetWidth+20)*this.lis.length+"px"; 
var that=this;
if(direction=="left"){ 
this.speed=-speed;
}else if(direction=="right"){ 
this.speed=speed;
} 
Slide.prototype.scroll=function(){ 
this.content.style.left=this.content.offsetLeft+this.speed+"px"; 
if(this.content.offsetLeft <= -this.content.offsetWidth/2){ 
this.content.style.left ="0px"; 
}else if(this.content.offsetLeft >=0){ 
this.content.style.left = -this.content.offsetWidth/2 + "px"; 
} 
} 
this.time=setInterval(function(){that.scroll()},100); 
this.container.onmouseover=function(){ 
clearInterval(that.time); 
} 
this.container.onmouseout=function(){ 
that.time=setInterval(function(){that.scroll()},100); 
} 
} 
</script> 
<script type="text/javascript"> 
window.onload=function(){new Slide("wrap","right",5)} 
</script> 

</head> 

<body> 
<div id="wrap"> 
<ul class="clearfix"> 
<li><a href="#"><img src="http://www.baidu.com/img/baidu_sylogo1.gif" /></a></li> 
<li><a href="#"><img src="http://www.baidu.com/img/baidu_sylogo1.gif" /></a></li> 
<li><a href="#"><img src="http://www.baidu.com/img/baidu_sylogo1.gif" /></a></li> 
<li><a href="#"><img src="http://imgtianqi.eastday.com/res/jingdian/25_58259_jiangsulvyou_jingdianbpfbs.jpg" /></a></li> 
<li><a href="#"><img src="http://imgtianqi.eastday.com/res/jingdian/25_58259_jiangsulvyou_jingdiancqsd.jpg" /></a></li> 
</ul> 
</div> 
</body> 
</html>